THOMAS Z TRENT, 54 - Found early in the morning of June 28 unresponsive in a parking lot in the 7400 block of 103rd Street. / Jacksonville Sheriff's Office

by WTLV-TV, Jacksonville, Fla.

by WTLV-TV, Jacksonville, Fla.

JACKSONVILLE, Fla. -- A 12-year-old boy has been arrested in the June shooting death of a homeless man.

The boy was one of two suspects seen in surveillance video from the night of 54-year-old Thomas Trent's death. The second suspect, a 16-year-old, was picked up on an unrelated robbery charge, and he helped lead police to the 12-year-old, according to the Jacksonville Sheriff's Office

Trent was found with a gunshot wound to the head in a Jacksonville strip mall on June 28.

"It's a horrific event," Jacksonville Sheriff's Office Assistant Chief Chris Butler said at a news conference. "Horrific for the victim ... but also you're talking about a 12-year-old child."

The weapon used in the shooting has not been recovered, Butler said. He said the 16-year-old is not a suspect in Trent's slaying but didn't elaborate.

The State Attorney's Office has not yet filed charges in the case, and declined further comment on the investigation.

Trent was homeless but had visited his sister Dawn McNabb at her Jacksonville home. She indicated in an interview that he had just got out of the hospital.

"Why would that child think it's OK to kill somebody, take somebody's life?" McNabb said. "He did not do nothing to him. That's wrong, just wrong."